Title:
METHOD FOR CONTINUOUSLY PRODUCING CAST ALUMINUM SHEET
Document Type and Number:
Japanese Patent JP3833208
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a relatively low-cost sheet material of a magnesium and manganese-containing aluminum alloy for high elongation forming of an article having a complicated shape.
SOLUTION: An alloy is continuously cast with an as-cast gage of 6 to 30 mm, is immediately hot-rolled at a final strip outlet temperature of 200 to 350°C and at a net rolling gage reduction of 30 to 80%, and is then coiled. The hot-rolled coil is annealed at 470 to 560°C to homogenize its microstructure. After cooling to an ambient temperature, the coil is cold-rolled to a desired sheet thickness, and has a net gage reduction of 50 to 90%. The cold-worked fine structure is suitably recrystallized, and thereafter the sheet is prepared for hot high elongation forming.
Inventors:
Rabi Bharma
Application Number:
JP2003357189A
Publication Date:
October 11, 2006
Filing Date:
October 17, 2003
Export Citation:
Assignee:
GENERAL MOTORS CORPORATION
International Classes:
B21B1/00; C22F1/047; B21B3/00; B22D11/00; B22D11/06; B22D11/12; C22C21/00; C22C21/06; C22F1/00; (IPC1-7): C22F1/047; B21B1/00; B21B3/00; B22D11/00; B22D11/06; B22D11/12; C22C21/00; //C22F1/00; C22K3:00
Domestic Patent References:
| JP7252613A | ||||
| JP59028554A | ||||
| JP2001262263A | ||||
| JP2002011527A | ||||
| JP62054182B1 |
Foreign References:
| WO1994019129A1 |
Attorney, Agent or Firm:
Kazuo Shamoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Shinya Hosokawa
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Shinya Hosokawa